Thank you both for giving me some direction. We've hashed it out and decided to take this third person out of the equation for now. It'll be rocky, but we both have accepted that our relationship might now work out, but because we both care for each so much, we're going to give it the best shot and work hard to get through our issues.

If we are able to patch our relationship and stay strong, I would like to one day be able to be comfortable in a polyamorous relationship, but changing that wiring in your head is so hard.